1089661117 has 4 divisors (see below), whose sum is σ = 1107524476. Its totient is φ = 1071797760.

The previous prime is 1089661091. The next prime is 1089661127. The reversal of 1089661117 is 7111669801.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 428862681 + 660798436 = 20709^2 + 25706^2 .

It is a cyclic number.

It is not a de Polignac number, because 1089661117 - 2¹¹ = 1089659069 is a prime.

It is a super-2 number, since 2×1089661117² = 2374722699803375378, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1089661117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089661127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8931588 + ... + 8931709.

It is an arithmetic number, because the mean of its divisors is an integer number (276881119).

Almost surely, 2^1089661117 is an apocalyptic number.

It is an amenable number.

1089661117 is a deficient number, since it is larger than the sum of its proper divisors (17863359).

1089661117 is an equidigital number, since it uses as much as digits as its factorization.

1089661117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17863358.

The product of its (nonzero) digits is 18144, while the sum is 40.

The square root of 1089661117 is about 33010.0154044193. The cubic root of 1089661117 is about 1029.0358014229.

The spelling of 1089661117 in words is "one billion, eighty-nine million, six hundred sixty-one thousand, one hundred seventeen".